CN201985752U - Direct current power supply polarity protection circuit and polarity protection joint comprising same - Google Patents
Direct current power supply polarity protection circuit and polarity protection joint comprising same Download PDFInfo
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- CN201985752U CN201985752U CN2011200153653U CN201120015365U CN201985752U CN 201985752 U CN201985752 U CN 201985752U CN 2011200153653 U CN2011200153653 U CN 2011200153653U CN 201120015365 U CN201120015365 U CN 201120015365U CN 201985752 U CN201985752 U CN 201985752U
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Abstract
The utility model discloses a direct current power supply polarity protection circuit and a polarity protection joint comprising the same. The direct current power supply polarity protection circuit comprises four diodes including a first diode, a second diode, a third diode and a fourth diode, wherein the cathode of the first diode is connected with that of the second diode; the anode of the first diode is connected with the cathode of the fourth diode; the anode of the fourth diode is connected with that of the third diode; and the cathode of the third diode is connected with the anode of the second diode. The direct current power supply polarity protection circuit also comprises an anode output terminal, a cathode output terminal, a first power supply input terminal and a second power supply input terminal. The direct current power supply polarity protection circuit has a simple structure, and is provided with the fixed anode output terminal and the fixed cathode output terminal to ensure a direct current circuit to work normally no matter how the polarity of a direct current power supply terminal is connected.
Description
Technical field
The utility model relates to a kind of power circuit, specifically, and the polarity protection joint that relates to a kind of DC power supply polar protective circuit and adopt described protective circuit to design.
Background technology
At present in the DC power supply circuit, the positive terminal of DC power supply correctly need be docked with the negative terminal of DC circuit with the positive terminal of DC circuit, the negative terminal of DC power supply, will cause the DC circuit cisco unity malfunction if the anode and cathode terminals of DC power supply connect instead, even damage DC circuit or the equipment that is inserted, cause the tremendous economic loss.A kind of common circuit polarity protection method is at the power input terminal place of DC circuit a diode to be set; as shown in Figure 1; unidirectional on state characteristic according to diode; when the electric power polarity terminal correctly inserted, diode current flow was when power positive cathode connects inverse time; diode ends; thereby protected DC circuit effectively, could work, brought inconvenience to use but sort circuit can only connect when correct DC circuit at electric power polarity.In order to address this problem, need a kind of DC power supply polar protective circuit of research and development, need not consider to insert the polarity energy operate as normal of power supply with protection DC circuit and assurance DC circuit.
When inserting the electrical equipment with DC circuit, DC power supply causes damage because of wrong polarity, some attaching plugs are mainly taked the form of anti-plug misconnection head at present, this joint has only a direction to dock, therefore, ensured that from mechanical structure electric power polarity can wrong, but this method for designing requires the power interface of attaching plug and electrical equipment to design in advance, and all be plug special, the socket of particular design generally, do not have versatility, under the occasion that does not have supporting plug or socket, can't use.
Based on this, how to research and develop a kind of polarity that need not to consider to insert dc power supply terminal, the DC power supply polar protective circuit that DC circuit can operate as normal is a subject matter to be solved in the utility model.
The utility model content
The utility model is in order to solve existing DC power supply protective circuit idle problem of DC circuit when the DC power supply polarity that inserts is incorrect; a kind of DC power supply polar protective circuit simple in structure has been proposed; need not to consider to insert the polarity of dc power supply terminal, DC circuit can operate as normal.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of DC power supply polar protective circuit; comprise four diodes that are built into the rectifier bridge form: the 1st diode; the 2nd diode; the 3rd diode and the 4th diode; the negative electrode of described the 1st diode is connected with the negative electrode of the 2nd diode; the anode of the 1st diode is connected with the negative electrode of the 4th diode; and the anode of the 4th diode is connected with the anode of the 3rd diode; the negative electrode of the 3rd diode is connected with the anode of the 2nd diode; described DC power supply polar protective circuit also comprises and anodal cathode output end that is connected of DC circuit; cathode output end that is connected with the DC circuit negative pole; and first power input terminal that is connected with external dc power; the second source input terminal; described cathode output end is connected with the negative electrode of the 1st diode; cathode output end is connected with the anode of the 3rd diode; described first power input terminal is connected with the anode of the 1st diode, and the second source input terminal is connected with the anode of the 2nd diode.
Based on above-mentioned DC power supply polar protective circuit structure; the utility model provides a kind of polarity protection joint that adopts described DC power supply polar protective circuit design again; comprise DC power supply polar protective circuit and the anode interface of fixedlying connected with the DC circuit positive pole; the negative pole interface of fixedlying connected with the DC circuit negative pole; described DC power supply polar protective circuit comprises four diodes: the 1st diode; the 2nd diode; the 3rd diode and the 4th diode; the negative electrode of described the 1st diode is connected with the negative electrode of the 2nd diode; the anode of the 1st diode is connected with the negative electrode of the 4th diode; and the anode of the 4th diode is connected with the anode of the 3rd diode; the negative electrode of the 3rd diode is connected with the anode of the 2nd diode; described DC power supply polar protective circuit also comprises cathode output end that is connected with described anode interface; cathode output end that is connected with described negative pole interface; and first power input terminal that is connected with external dc power; the second source input terminal; described cathode output end is connected with the negative electrode of the 1st diode; cathode output end is connected with the anode of the 3rd diode; described first power input terminal is connected with the anode of the 1st diode, and the second source input terminal is connected with the anode of the 2nd diode.
Compared with prior art; advantage of the present utility model and good effect are: DC power supply polar protective circuit of the present utility model is built into the rectifier bridge form by adopting four diodes; circuit structure is simple; no matter how the polarity of dc power supply terminal inserts; the DC power supply polar protective circuit has fixing cathode output end and cathode output end, thereby guarantees the DC circuit operate as normal.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the schematic diagram of conventional power source polar protective circuit circuit;
Fig. 2 is the schematic diagram of the DC power supply polar protective circuit that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is done explanation in further detail.
The utility model is provided with a diode by adopting at the power input terminal place of DC circuit in order to solve existing DC power supply polar protective circuit; unidirectional on state characteristic according to diode is protected DC circuit; sort circuit is worked as electric power polarity and is connect inverse time DC circuit cisco unity malfunction; cause awkward problem; a kind of DC power supply polar protective circuit has been proposed; can realize DC power supply polarity protection function by adopting four diodes to be built into the rectifier bridge form; circuit structure is simple, and is easy to use.
Be example with the polarity protection joint below, elaborate the concrete establishment structure and the operation principle thereof of described DC circuit polar circuit by a specific embodiment.
Embodiment one; referring to shown in Figure 2; DC power supply polar protective circuit in the present embodiment polarity protection joint comprises four diodes: the 1st diode D1; the 2nd diode D2; the 3rd diode D3 and the 4th diode D4; the negative electrode of described the 1st diode D1 is connected with the negative electrode of the 2nd diode D2; the anode of the 1st diode D1 is connected with the negative electrode of the 4th diode D4; and the anode of the 4th diode D4 is connected with the anode of the 3rd diode D3; the negative electrode of the 3rd diode D3 is connected with the anode of the 2nd diode D2; described DC power supply polar protective circuit also comprises the sub-Vout+ of cathode output end; the sub-Vout-of cathode output end; and the first power input terminal Vin1; second source input terminal Vin2; the sub-Vout+ of described cathode output end is connected with the negative electrode of the 1st diode D1; the sub-Vout-of cathode output end is connected with the anode of the 3rd diode D3; the described first power input terminal Vin1 is connected with the anode of the 1st diode D1, and second source input terminal Vin2 is connected with the anode of the 2nd diode D2.When the DC power supply polar protective circuit inserts DC power supply; the described first power input terminal Vin1; second source input terminal Vin2 is connected with DC power supply; no matter Vin1 connects positive source; it still is that Vin1 connects power cathode that Vin2 connects power cathode; Vin2 connects positive source; through after the DC power supply polar protective circuit rectification of present embodiment; it is anodal that the sub-Vout+ of described cathode output end remains; the sub-Vout-of described cathode output end remains negative pole; therefore; when connecting DC circuit; Vout+ is connected with the positive pole of DC circuit by the anode interface of polarity protection joint, and Vout-is connected with the negative pole of DC circuit by the negative pole interface of polarity protection joint.
Described polarity protection joint can be taked to be implanted in the DC circuit; the sub-Vout+ of maintenance cathode output end is connected with the positive pole of DC circuit all the time, the sub-Vout-of cathode output end is connected with the negative pole of DC circuit all the time; only need during use DC power supply is connected with the first power input terminal Vin1, the second source input terminal Vin2 of joint; need not to consider to insert the polarity of DC power supply, described DC circuit can operate as normal.
The DC power supply polar protective circuit of present embodiment adopts four diodes to carry out circuit design; can carry out rectification to the direct current of input; make cathode output end of protective circuit remain anodal; cathode output end remains negative pole; only need with cathode output end keep being connected with the positive pole of DC circuit, the sub-maintenance of cathode output end is connected with the negative pole of DC circuit; but needn't consider to insert the equal operate as normal of polarity DC circuit of DC power supply; can well protect DC circuit; circuit structure is simple, realizes easily.
The above only is preferred embodiment of the present utility model, is not to be to restriction of the present utility model, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection range of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (2)
1. DC power supply polar protective circuit; it is characterized in that: comprise four diodes that are built into the rectifier bridge form: the 1st diode; the 2nd diode; the 3rd diode and the 4th diode; the negative electrode of described the 1st diode is connected with the negative electrode of the 2nd diode; the anode of the 1st diode is connected with the negative electrode of the 4th diode; and the anode of the 4th diode is connected with the anode of the 3rd diode; the negative electrode of the 3rd diode is connected with the anode of the 2nd diode; described DC power supply polar protective circuit also comprises and anodal cathode output end that is connected of DC circuit; cathode output end that is connected with the DC circuit negative pole; and first power input terminal that is connected with external dc power; the second source input terminal; described cathode output end is connected with the negative electrode of the 1st diode; cathode output end is connected with the anode of the 3rd diode; described first power input terminal is connected with the anode of the 1st diode, and the second source input terminal is connected with the anode of the 2nd diode.
2. polarity protection joint; it is characterized in that: comprise DC power supply polar protective circuit and the anode interface of fixedlying connected with the DC circuit positive pole; the negative pole interface of fixedlying connected with the DC circuit negative pole; described DC power supply polar protective circuit comprises four diodes: the 1st diode; the 2nd diode; the 3rd diode and the 4th diode; the negative electrode of described the 1st diode is connected with the negative electrode of the 2nd diode; the anode of the 1st diode is connected with the negative electrode of the 4th diode; and the anode of the 4th diode is connected with the anode of the 3rd diode; the negative electrode of the 3rd diode is connected with the anode of the 2nd diode; described DC power supply polar protective circuit also comprises cathode output end that is connected with described anode interface; cathode output end that is connected with described negative pole interface; and first power input terminal that is connected with external dc power; the second source input terminal; described cathode output end is connected with the negative electrode of the 1st diode; cathode output end is connected with the anode of the 3rd diode; described first power input terminal is connected with the anode of the 1st diode, and the second source input terminal is connected with the anode of the 2nd diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200153653U CN201985752U (en) | 2011-01-12 | 2011-01-12 | Direct current power supply polarity protection circuit and polarity protection joint comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200153653U CN201985752U (en) | 2011-01-12 | 2011-01-12 | Direct current power supply polarity protection circuit and polarity protection joint comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985752U true CN201985752U (en) | 2011-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200153653U Expired - Fee Related CN201985752U (en) | 2011-01-12 | 2011-01-12 | Direct current power supply polarity protection circuit and polarity protection joint comprising same |
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| CN (1) | CN201985752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114925007A (en) * | 2022-06-09 | 2022-08-19 | 盈帜科技（常州）有限公司 | Signal conversion circuit |
-
2011
- 2011-01-12 CN CN2011200153653U patent/CN201985752U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114925007A (en) * | 2022-06-09 | 2022-08-19 | 盈帜科技（常州）有限公司 | Signal conversion circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20120112 |